The utility model relates to a rack plugging device belongs to the technical field of rack shutoff accessory, the problem of the technique is solved for: the utility model provides a but simple to operate, wiring rack inlet wire device convenient, just repetitious usage, the technical scheme who adopts does: a rack plugging device, includes left casing and right casing, left side casing and right casing are one side open -ended rectangle framework, left side casing corresponds the grafting with right casing and coordinates formation confined rectangle framework together, it do not is provided with pothook and snap ring to equally divide in corresponding grafting department of left side casing and right casing both sides, the pothook corresponds the joint with the snap ring and is in the same place to lock left casing and right casing, rectangle frame that left side casing and right casing cooperation formed is internal transversely to be provided with one or many crossbeams, the crossbeam sets up along the grafting direction of left casing and right casing, a plurality of cable passages are separated into with the left casing rectangle framework that the cooperation formed with right casing to the crossbeam, the cable passage is used for walking the line, be applicable to various racks.